TY JOUR TI THE APPROACH TO CHOOSING THE MOST EFFECTIVE MATHEMATICAL INVESTMENT PROJECT RENOVATION KW renovation Project KW analytic hierarchy process KW investment attractiveness KW economic efficiency JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Bereza, A.N. AU Zharikov, I.S. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov